Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For extrusion or injection type shaping means
Patent
1996-05-17
1998-03-24
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
For extrusion or injection type shaping means
264334, 425556, 425DIG5, B29C 4540
Patent
active
057310149
ABSTRACT:
A modular injection mold assembly having a core part with an ejector box side securable to a mold base and a core side presenting a first mold face on an outer surface. The assembly further includes a cavity part presenting a second mold face mountable opposite the first mold face. An ejector assembly is mounted within the ejector box side of the core part and has a base member and at least one ejector pin extending from the base member through the core. The ejector assembly is movable relative to the core between a retracted position in which an outer end of each of the ejector pins forms part of the first mold face and an extended position wherein the outer end of each of the ejector pins protrudes from the first mold face. The base member of the ejector assembly further includes a cam follower for causing the ejector assembly to move from the retracted position to the extended position in response to input from a cam mounted to either the mold base or the core. The mold assembly is removable from the mold base as a unit with the ejector assembly and exchangeable for another mold assembly without removal of the ejector pins from the core part.
REFERENCES:
patent: 4124352 (1978-11-01), Pasch
patent: 4162138 (1979-07-01), Byrne
patent: 4497624 (1985-02-01), Brun et al.
patent: 5565223 (1996-10-01), McCready et al.
Heitbrink Tim
Tradesco Mold Limited
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